Instantaneous electric shower water heater



FIG. 1 is a front perspective view of an instantaneous electric shower water heater, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof; the left side being a mirror image thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken line representation of a shower head in FIG. 1 and the fragmentary broken line representation of electrical cables in FIGS. 1, 2, 3, 4 and 5 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an instantaneous electric shower water heater, as shown and described. 